Polyphonic piano roll display

Does anyone know if a simple piano-roll like display has been developed for max?

I've been searching on the forums and all i can find is not exactly what i'm searching for.
I came across note~, which seems somehow deprecated and mac only, the detonate object for max which has a graphica interface but which cannot be used when compiling a standalone, live.step which is just monophonic... and a bunch of externals which are either not free or overcomplicated.

I just found this m4l midi looper: https://isotonikstudios.com/product/note-looper-dynamic-midi-looping/
which has a minimalistic note display very similar to what i'm searching for. Unfortunately that is closed source and can't be recycled.

I just want a display, so no need for editing notes or mouse clicking. It's just for visualization purposes. I guess that might be something doable using jitter...

Any ideas? does anyone know if there's some example around to start with? I'll be happy to develop something like it, but i think i need a first hint....

(by the way, i guess that once done, going from the simple display to something more "artistic" or sophisticated like this wouldn't be that hard: https://www.youtube.com/watch?v=LlvUepMa31o) (my god, i love that project!)

Thank you everybody!!!!